Finding the Fourth Proportional to 72,012.47, 99,361.30 and 41,780.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,012.47 : 99,361.30 = 41,780.28 : x
2. Step 2: Convert to fraction form
   72,012.47/99,361.30 = 41,780.28/x
3. Step 3: Cross multiply
   72,012.47x = 99,361.30 × 41,780.28
4. Step 4: Simplify right side
   72,012.47x = 4,151,342,935.16
5. Step 5: Solve for x
   x = 4,151,342,935.16/72,012.47
6. Step 6: Final answer
   x = 57,647.56